The real point is that we do this for fun. If you want a pilot of whatever type then have one and if you don't then fine. It doesn't make the plane fly any better, unless the figure adds ballast! What you add to a scale model makes it a characature of the real plane. In the Spitfire shot above you can't see any panel lines, cowls fastners, paint scuffs, access flaps etc. The way to achieve a finish like that would be nice glossy iron on film and no detailing, but I doubt you'd get many compliments.